Acidity of （CH3）3SiCl-Modified ZSM-5 Zeolite and Its Catalysis in Toluene Disproportionation Reaction

作     者：Li Jieming, Jiang Dazhen, Fan Shuguang and Sun Zhongqi (Department of Chemistry, Jilin University,Changchun) 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究)

年 卷 期：1988年第2期

页      面：72-80页

学科分类：07[理学] 0703[理学-化学] 

主　　题：HZSM-5 zeolites Surface acidity catalysis 

摘      要：HZSM-5 zeolites modified by Si(CH3)3 Cl were studied by TPD, IKand 27Al NMR to characterize their surface properties and bycatalytic reaction of toluene *** was found that the concentration of the stronger Bronsted acid sites were decreased and the stronger Lewis acid sites were increased after modifieation with Si(CH3),Cl. The TPD peaks of NH3, presumally attributed to stronger acid sites (peak Ⅱ ) were decreased by the deposition of Si(CH3)3 Cl on the surface of the *** selectivity to the para xylene can be attained not only by controlling the pore opening and channels of the zeolite, hut also by changing the concentration of the stronger acid sites and the acidic type on the surface of the zeolite.